• Corpus ID: 245650499

Quasiprobability fluctuation theorem behind the spread of quantum information

@inproceedings{Zhang2022QuasiprobabilityFT,
  title={Quasiprobability fluctuation theorem behind the spread of quantum information},
  author={Kun Zhang and Jin Wang},
  year={2022}
}

• Kun Zhang, Jin Wang
• Published 2 January 2022
• Physics

Information spreads in time evolution. For example, the quantum correlation decays when the correlated system locally couples to a third party, such as the environment. This simple but important fact is known as the quantum data-processing inequality. Here we theoretically reveal the quantum fluctuation theorem behind the quantum informational inequality. The fluctuation theorem quantitatively predicts the statistics of such process. To fully capture the quantum nature, the fluctuation theorem established here is extended to the quasiprobability regime. We also experimentally apply a interference-based method to measure the amplitudes composing the quasiprobability and verify our established fluctuation theorem on the IBM quantum computers.